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nine
nine years of age
twelve o'clock (old time system)
りんごが9つもある。
There are as many as nine apples.
妹いもうとは来年らいねん九ここのつになるんだよ。
My little sister turns nine next year.
9つ全部ぜんぶを並べならべてみた。
I tried lining up all nine.